Method to Fix If Unable To Play Audio and Video in PowerPoint:

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www.office.com/setup - PowerPoint will not play audio files if the file format isn't supported. Furthermore, if your audio file isn't properly embedded, it will not be compatible with PowerPoint. Sometimes the audio plays but the volume is not sufficient. Therefore, you should increase the volume of your computer until it is at an acceptable volume. It's not a secret that PowerPoint is a wildly well-known MS Office application. It is used to create corporate or college-level presentations. The tools that it provides, like videos, animations, and audio recordings help make your presentations more exciting and interesting. But sometimes, the media files aren't able to be used when you use PowerPoint. While you're presenting the video might be stuck or display an error, 

When you use an office software, ie, PowerPoint on your device, it difficult to fix certain errors. Of these, one of them is that PowerPoint is unable to play audio or video files files in mp4 format. This could cause video content ie music, video clips or videos that are embedded into the powerpoint, to not perform as expected or to not to play even at all. To ensure the proper functioning of media files, it is important to choose the proper format to the version for MS Officeuse. PowerPoint does not play multimedia is a common issue when using PowerPoint slides. It can also be caused by an issue with the functioning in PowerPoint itself. Powerpoint is the top option when it comes to slideshows and presentations. It permits users to mix all types of multimedia such as videos, audio, pictures as well as animation-related effects. Users often face problems where users are unable to play the audio or video files.